The results of sex abuse are incalculably bad.
The issue about "nuns beating unwed mothers" is a different matter altogether. It's a moral defamation, literally a fabrication by the Left-feminist media. In 2002, the wildly popular "Magdalene Laundries" movie came out, which claimed that these were horrific institutions brimming with violence and overseen by sadistic, pervy nuns. Yet the McAleese Report (published by the Irish govt legal investigation) found not a single incident of sexual abuse by a nun in a Magdalene laundry. Not one. Also, the vast majority of its interviewees said they were never physically punished in the laundries.
One of the very women whose "first-hand" account supposedly formed the basis of the movie, said It has shocked me to read in papers that we were beat and our heads shaved and that we were badly treated by the nuns... I was not touched by any nun and I never saw anyone touched."
The nuns were not only not abusers, they were the only people in Ireland at the time (1950's - 70's I think it was) trying to protect these girls from falling into beggary, prostitution and child abandonment.
Here's a good, accurate summary at MercatorNet
I highly recommend reading the McAleese report, which is online. A good article is this one by Brendan O'Neill, who is neither a Catholic nor a Catholic apologist but often exposes the lying propaganda found in the Irish and UK left-wing press. (Click the first article listed)
Magdalene Laundries is an attack on Church that undiscerning people believe. Most news is propaganda, must people not too bright. Read sensational stories questioning every word, and ask yourself what is left out! 80% is simply not written, that’s the true part. You’ve heard of fake news, so why do you think what you are reading is real?